I have a commercial property in a Tier 4 TOC area in the Miracle Mile (Wilshire Blvd) that currently has retail on the ground floor and office above. 

Real estate taxes are public record, you can call the assessor's office to find out. 

I'm closing on a 4 unit office building this week, and the realtor did an Estoppel Letter for the existing leases, which assigned the tenant's lease to me as the new owner.

Thanks for the tip on the meetup group.

I suggested that they go to the lawyers office who has the checks to get the situation resolved.

Once in city hall, I visited Department of Records, office 154-Office of Deeds, office 180-Register of wills, Sheriff's office (100 Broad St.), Municipal Building (office of taxation), Office of Housing and Comunity Development and Office of Property Assessment per each office referral until they start referring me back to each other with no luck.

Go to your local recorders office, pull all the properties that have a notice of trustee sale filed (going to auction soon), find the ones with enough equity in them and door knock.

If one of you is active military ask your JAG officer.

I downloaded a list of all tax delinquent property owners in my county from the tax assessors office.  

The lawn got out of control and because the property owner information hadn't been updated in the city's database yet, San Jose sent me a letter after someone complained (forwarded to me by the Post Office).The letter said I had so many days to remedy the situation and the city would send out an inspector to check.